body {
    margin: 0;
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, #000000, #0f9d58);
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    position: relative;
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover, 
                linear-gradient(135deg, #000000, #1a237e);
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #ffffff;
}

header h1 {
    font-size: 3em;
    font-family: 'Futura', sans-serif;
    text-shadow: 0px 4px 6px rgba(0, 0, 0, 0.5);
    animation: fadeIn 2s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.container {
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.grid-item {
    background: rgba(0, 0, 0, 0.7);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.grid-item:hover {
    transform: scale(1.05);
}

.grid-item img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}

h2, h3, h4 {
    font-family: 'Futura', sans-serif;
    color: #0f9d58;
    margin-top: 30px;
}

p {
    font-size: 1em;
    color: #e0e0e0;
}

pre {
    background: rgba(0, 0, 0, 0.8);
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Roboto Mono', monospace;
    color: #0f9d58;
}

code {
    color: #ffeb3b;
}

.circle-button {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #0f9d58;
    box-shadow: 0px 0px 10px rgba(15, 157, 88, 0.8);
    transition: transform 0.3s ease;
    display: inline-block;
    margin: 10px;
}

.circle-button:hover {
    transform: scale(1.1);
}

.transparent-layer {
    background-color: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 5px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th, td {
    border: 1px solid #0f9d58;
    padding: 10px;
    text-align: left;
}

th {
    background-color: #0f9d58;
    color: #000000;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }

    .grid-container {
        grid-template-columns: 1fr;
    }

    pre {
        font-size: 0.9em;
    }
}